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ERROR 504

LG TV & Audio · 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV

LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV ERROR 504 Error Fix: Server Timeout

The LG content or app server did not respond within the expected time. LG servers may be experiencing high load or are temporarily down. Retry later. This is typically a transient server-side issue and resolves on its own.

Low severity2 fixes available✨ Free fix available
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Quick Answer

Error ERROR 504 on the LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV means: Server Timeout. The top-ranked community fix is “Update TV Firmware and Reset Network Settings” (medium difficulty, ~30 min, DIY cost: $0). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · tv

Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.

When to Call a Professional

While many tv repairs can be done safely at home, consider hiring a qualified technician if:

  • The repair involves electrical wiring, gas lines, or refrigerant
  • You've tried the top-ranked fix and the error persists
  • You smell gas, see sparking, or notice water leaking
  • The repair requires specialized tools you don't have
  • Your appliance is still under manufacturer warranty

Average professional repair cost for this issue: $120-$180.

Other LG TV & Audio Models with Error ERROR 504

75NANO75UQA 75" Class NanoCell 75 Series 4K Smart TV

tv · 2 fixes

86QNED80URA 86" Class QNED80 4K QNED MiniLED Smart TV

tv · 2 fixes

OLED55B3PUA 55" Class B3 4K OLED Smart TV

tv · 2 fixes

OLED65C3PUA 65" Class C3 4K OLED evo Smart TV

tv · 2 fixes

OLED65C4PUA 65" Class C4 4K OLED evo Smart TV

tv · 2 fixes

OLED65G3PUA 65" Class G3 4K OLED evo Gallery Edition Smart TV

tv · 2 fixes

Other LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV Error Codes

APP CRASH

App Freezes or Crashes

2 fixes
AUDIO SYNC

Audio Out of Sync with Video

2 fixes
BACKLIGHT BLEED

Backlight Bleeding / Clouding

2 fixes
BACKLIGHT FAILURE

LED Backlight Strip Failure — No Picture

2 fixes
BACKLIGHT STRIP FAIL

LED Backlight Strip Physical Failure

2 fixes
BANDING

Horizontal or Vertical Banding

2 fixes
BLINK 2X

Power Supply Overcurrent / Short

2 fixes
BLINK 3X

Main Board Failure

2 fixes

People Also Ask About LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV Error ERROR 504

What does error code ERROR 504 mean on a LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV?
Error code ERROR 504 on the LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV means: Server Timeout. The LG content or app server did not respond within the expected time. LG servers may be experiencing high load or are temporarily down. Retry later. This is typically a transient server-side issue and resolves on its own.
How do I fix error code ERROR 504 on my LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV?
The most successful fix is "Update TV Firmware and Reset Network Settings" (medium difficulty, ~30 minutes). This fix costs nothing. HomeMD has 2 community-ranked fixes for this error.
Is error code ERROR 504 on a LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV serious?
This error is rated low severity. It is generally not urgent and can often be resolved with a simple DIY fix.
Can I fix LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV error ERROR 504 myself?
Yes — the top-ranked community fix ("Update TV Firmware and Reset Network Settings") is rated medium difficulty and takes about 30 minutes. Tools needed: TV remote.
How much does it cost to repair LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV error ERROR 504?
DIY cost: $0. Professional repair typically costs $120-$180. Many homeowners save money by trying the top-ranked community fix first.
What other error codes does the LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV have?
The LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV has 8 other known error codes, including: APP CRASH (App Freezes or Crashes), AUDIO SYNC (Audio Out of Sync with Video), BACKLIGHT BLEED (Backlight Bleeding / Clouding), BACKLIGHT FAILURE (LED Backlight Strip Failure — No Picture), BACKLIGHT STRIP FAIL (LED Backlight Strip Physical Failure), and 3 more.
Which other LG TV & Audio models have the ERROR 504 error?
Error code ERROR 504 also appears on 6 other LG TV & Audio models: 75NANO75UQA 75" Class NanoCell 75 Series 4K Smart TV, 86QNED80URA 86" Class QNED80 4K QNED MiniLED Smart TV, OLED55B3PUA 55" Class B3 4K OLED Smart TV, OLED65C3PUA 65" Class C3 4K OLED evo Smart TV, OLED65C4PUA 65" Class C4 4K OLED evo Smart TV, OLED65G3PUA 65" Class G3 4K OLED evo Gallery Edition Smart TV. The fix may vary by model, so check each model's specific page for tailored repair steps.
What other error codes does the LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV have?

The LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV has 8 other known error codes:

Which other LG TV & Audio models have the ERROR 504 error?

Error code ERROR 504 also appears on 6 other LG TV & Audio models:

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